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Novel multi-carboxyl and phosphorus-free polycarboxylic acid scale inhibitor and preparation method thereof

A technology of antiscalant and polycarboxylic acid, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. It can solve the problems of insufficient performance of various scales and scales, and achieves wide application Sexuality, good effect, and remarkable effect

Inactive Publication Date: 2011-10-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented inventor's solution works well for various industries where there are very few sources or large amounts of wastewater used by these companies. It does this because it contains no harmful substances like chlorine gas (Cl2).

Problems solved by technology

This patent describes various technical problem addressed during the use of calcium salt scale invention relational fields like paper manufacturing or wastewater purification systems that require efficient cleanings without causing harmful effects from excessive amounts of certain types of scaling substances commonly found in these industries. Current solutions involve complicated processes requiring expensive materials and reagents.

Method used

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  • Novel multi-carboxyl and phosphorus-free polycarboxylic acid scale inhibitor and preparation method thereof
  • Novel multi-carboxyl and phosphorus-free polycarboxylic acid scale inhibitor and preparation method thereof
  • Novel multi-carboxyl and phosphorus-free polycarboxylic acid scale inhibitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Dissolve 25g of methacrylic acid, 15g of methacrylamidodiacetic acid and 20g of sodium methacrylate in 140g of water to form an aqueous solution (1), dissolve 5g of ammonium persulfate in 45g of water to form an aqueous solution (2) Add 10g distilled water in the four-necked flask that thermometer, condenser and constant pressure dropping funnel are housed, when heating up to 70 ℃, slowly drop above-mentioned solution (1) and (2) under stirring simultaneously, solution (1 ) was added dropwise for 2 hours, solution (2) was added dropwise for 2.5 hours, after the dropwise addition was completed, it was incubated at 70° C. for 2 hours, cooled, and adjusted to pH=7 with 30% sodium hydroxide to obtain a polycarboxylated phosphorus-free solution with a solid content of 30%. A new polycarboxylate antiscalant solution.

Embodiment 2

[0022] Dissolve 20g of acrylic acid, 25g of methacrylamidodiacetic acid, and 16g of sodium methacrylsulfonate in 140g of water to form an aqueous solution (1), and dissolve 6g of ammonium persulfate in 50g of water to form an aqueous solution (2); The method and steps of the above-mentioned Example 1 were operated to obtain a polycarboxylate phosphorus-free novel polycarboxylate scale inhibitor solution.

Embodiment 3

[0024] 30g of maleic anhydride was adjusted to pH 5 with 30% sodium hydroxide, 15g of methacrylamidodiacetic acid and 20g of sodium methacrylsulfonate were added, dissolved in 140g of water together to form an aqueous solution (1), and 5g of persulfuric acid Ammonium was dissolved in 45g of water to form an aqueous solution (2), and the method and steps of the above-mentioned embodiment 1 were used to obtain the polycarboxylate phosphorus-free novel polycarboxylate scale inhibitor solution.

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Abstract

The invention discloses a novel multi-carboxyl and phosphorus-free polycarboxylic acid scale inhibitor, which is prepared by, by mass weight, 20-50 parts of CH2=CR COOM or maleic anhydride or its sodium salt, 10-40 parts of CH2=CRCON(CH2COOM)2, 10-40 parts of CH2=CRCH2SO3Na, with R equal to H or CH3 and M equal to H or Na, 2-10 parts of ammonium persulfate as initiator, and 100-200 parts of water. The scale inhibitor of the invention present scale inhibiting performance for calcium carbonate scale, barium sulfate scale, strontium sulfate scale and the like, and is also characterized by phosphorus-free, stable in molecular structure and heat resisting. With wide applicability, the scale inhibitor of the invention can be applied to the treatment of recirculated cooling water, oil recovery and water injection, with the advantages of small amount of the inhibitor, good effect and significant benefit.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV
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